<template>
  <div class="app-container">
    <!-- 输入表单 -->
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="入驻时间">
        <el-date-picker v-model="teacher.joinDate" value-format="yyyy-MM-dd"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" :min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
            -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="0" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro"/>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像 -->
      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
        <el-upload
          :show-file-list="false"
          :on-success="handleAvatarSuccess"
          :before-upload="beforeAvatarUpload"
          :on-error="handleAvatarError"
          :action="BASE_API+'/admin/vod/file/upload?module=avatar'"
          class="avatar-uploader">
          <img v-if="teacher.avatar" :src="teacher.avatar">
          <i v-else class="el-icon-plus avatar-uploader-icon"/>
        </el-upload>
      </el-form-item>

      <el-form-item>
        <el-button type="primary" @click="saveOrUpdate()">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>


<script>
  import { save,getById,updateById } from '@/api/vod/teacher'
  export default {
    data() {
      return {
        BASE_API: 'http://localhost:8301',
        // 初始化讲师默认数据
        teacher: {
          sort: 0,
          level: 1
        },
        saveBtnDisabled: false // 保存按钮是否禁用，防止表单重复提交
      }
    },
    // 页面渲染成功
    created() {
      if (this.$route.params.id) {
        this.fetchDataById(this.$route.params.id)
      }
    },
    methods: {
      // 上传成功回调
      handleAvatarSuccess(res, file) {
        // console.log(res)
        if (res.code==20000) {
          // console.log(res)
          this.teacher.avatar = res.data
          // 强制重新渲染
          this.$forceUpdate()
        } else {
          this.$message.error('上传失败 （非0）')
        }
      },

// 错误处理
      handleAvatarError() {
        console.log('error')
        this.$message.error('上传失败（http失败）')
      },

// 上传校验
      beforeAvatarUpload(file) {
        const isJPG = file.type === 'image/jpeg'
        const isLt2M = file.size / 1024 / 1024 < 2

        if (!isJPG) {
          this.$message.error('上传头像图片只能是 JPG 格式!')
        }
        if (!isLt2M) {
          this.$message.error('上传头像图片大小不能超过 2MB!')
        }
        return isJPG && isLt2M
      },
      saveOrUpdate() {
        // 禁用保存按钮
        this.saveBtnDisabled = true
        if (!this.teacher.id) {
          this.saveData()
        } else {
          this.updateData()
        }
      },
      // 根据id查询记录
      fetchDataById(id) {
        getById(id).then(response => {
          this.teacher = response.data
        })
      },
      // 新增讲师
      saveData() {
        // debugger
        save(this.teacher).then(response => {
          this.$message({
            type: 'success',
            message: "添加成功"
          })
          //跳转
          this.$router.push({ path: '/vod/teacher/list' })
        })
      },
      // 修改讲师
      updateData() {
        // debugger
        updateById(this.teacher).then(response => {
          this.$message({
            type: 'success',
            message: "修改成功"
          })
          //跳转
          this.$router.push({ path: '/vod/teacher/list' })
        })
      }
    }
  }
</script>

